N$11$M$\mathrm{.}6$ not all orbit problems are astrophysical! IN $1911,$ Ernest Rutherford proposed that all attoms consist of a tiny nucleus surrounded by comparatively lightweight electrons in circular orbits. he assumed that each electron was held in its orbit by the force of electrostatic attraction between the negatively charged electron $($whose charge is $-$e where e$=1\mathrm{.}6$ x $10^-16$